Public water system · CT0120021
ActiveCtwc - Northern Reg-Llynwood System
At a glance
Ctwc - Northern Reg-Llynwood System (PWSID CT0120021) is an active community water system in Tolland County, Connecticut. It reports serving 192 people through 73 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2009.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
192
Service connections
73
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Ctwc - Northern Reg-Llynwood System compare with other water systems in Tolland County?
By EPA's size categories, Ctwc - Northern Reg-Llynwood System is a very small system (500 people or fewer). Tolland County has 296 active public water systems. Its population served is roughly in line with the county average of 202 people per system, and accounts for 0.3% of the 59,796 people reported by systems filed under the county. Across Connecticut, the 2,363 active systems average 1,247 people each. Nationally, the average active community water system reports serving 6,703 people, so Ctwc - Northern Reg-Llynwood System is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Connecticut has 481 active community water systems, 20% of the state's 2,363 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,263 Connecticut systems (96%) list groundwater as their primary source.
Who owns and regulates Ctwc - Northern Reg-Llynwood System?
EPA lists Ctwc - Northern Reg-Llynwood System as privately owned. The CT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 253 of the 296 active systems in Tolland County (85%) are also privately owned.
Does Ctwc - Northern Reg-Llynwood System have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2009. The violations listed here began between January 2009 and January 2009. By type: 12 monitoring and reporting. The contaminants or rules involved are 1,2-Dichloropropane, Tetrachloroethylene, trans-1,2-Dichloroethylene and Carbon tetrachloride. EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Ctwc - Northern Reg-Llynwood System: frequently asked questions
Who runs Ctwc - Northern Reg-Llynwood System?
Ctwc - Northern Reg-Llynwood System (PWSID CT0120021) is a community water system privately owned. It is regulated by the CT state drinking water program.
How many people does Ctwc - Northern Reg-Llynwood System serve?
Ctwc - Northern Reg-Llynwood System reports serving 192 people through 73 service connections in Tolland County, Connecticut.
Where does Ctwc - Northern Reg-Llynwood System get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Ctwc - Northern Reg-Llynwood System have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2009. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Ctwc - Northern Reg-Llynwood System's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2009. For current results, consult the system's annual water quality report, EPA ECHO, or the CT state drinking water program.
Where can I find Ctwc - Northern Reg-Llynwood System's water quality report?
As a community water system, Ctwc - Northern Reg-Llynwood System must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Tolland County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| University of Connecticut - Main Campus | Tolland | 27,199 | Community | Purchased surface water |
| Ctwc - Hebron Center Division | Tolland | 1,927 | Community | Groundwater |
| Coventry High & Nathan Hale Schools | Tolland | 1,252 | Non-transient non-community | Groundwater |
| Tolland Water Department | Tolland | 1,251 | Community | Groundwater |
| Ctwc - Amston Lake Division | Tolland | 910 | Community | Groundwater |
| Horace Porter School | Tolland | 797 | Non-transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Ctwc - Northern Reg-Llynwood System, PWSID CT0120021, Connecticut”, https://aquacensus.com/water-systems/connecticut/ctwc-northern-reg-llynwood-system-ct0120021 (data as of October 1, 2026).